Add deleteWord.

bug: 6669677

Change-Id: I1a5b90ee05e5cffd74a5c140384a3e37c79e7e70

2 files changed, 23 insertions, 1 deletions

diff --git a/java/src/com/android/inputmethod/latin/makedict/BinaryDictIOUtils.java b/java/src/com/android/inputmethod/latin/makedict/BinaryDictIOUtils.java
index 406071071..397532933 100644
--- a/java/src/com/android/inputmethod/latin/makedict/BinaryDictIOUtils.java
+++ b/java/src/com/android/inputmethod/latin/makedict/BinaryDictIOUtils.java
@@ -201,4 +201,26 @@ public class BinaryDictIOUtils {
         }
         return FormatSpec.NOT_VALID_WORD;
     }
+
+    /**
+     * Delete the word from the binary file.
+     *
+     * @param buffer the buffer to write.
+     * @param word the word we delete
+     * @throws IOException
+     * @throws UnsupportedFormatException
+     */
+    public static void deleteWord(final FusionDictionaryBufferInterface buffer,
+            final String word) throws IOException, UnsupportedFormatException {
+        buffer.position(0);
+        final FileHeader header = BinaryDictInputOutput.readHeader(buffer);
+        final int wordPosition = getTerminalPosition(buffer, word);
+        if (wordPosition == FormatSpec.NOT_VALID_WORD) return;
+
+        buffer.position(wordPosition);
+        final int flags = buffer.readUnsignedByte();
+        final int newFlags = flags ^ FormatSpec.FLAG_IS_TERMINAL;
+        buffer.position(wordPosition);
+        buffer.put((byte)newFlags);
+    }
 }
diff --git a/java/src/com/android/inputmethod/latin/makedict/BinaryDictInputOutput.java b/java/src/com/android/inputmethod/latin/makedict/BinaryDictInputOutput.java
index 1d3e94bb7..7b8dc5cc5 100644
--- a/java/src/com/android/inputmethod/latin/makedict/BinaryDictInputOutput.java
+++ b/java/src/com/android/inputmethod/latin/makedict/BinaryDictInputOutput.java
@@ -392,7 +392,7 @@ public class BinaryDictInputOutput {
     /**
      * Helper method to check whether the CharGroup has a parent address.
      */
-    private static boolean hasParentAddress(final FormatOptions options) {
+    public static boolean hasParentAddress(final FormatOptions options) {
         return options.mVersion >= FormatSpec.FIRST_VERSION_WITH_PARENT_ADDRESS
                 && options.mHasParentAddress;
     }